wastewater treatment aluminium surface treatment raw at argentina

wastewater treatment aluminium surface treatment raw at argentina
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  • How much aluminium is recovered from water treatment plants in Malaysia?
  • At optimum condition, 68.8% of aluminium recovery was obtained. For decades, water treatment plants in Malaysia have widely employed aluminium-based coagulant for the removal of colloidal particles in surface water. This generates huge amount of by-product, known as sludge that is either reused for land applications or disposed to landfills.
  • What is aluminium used for in water treatment?
  • Aluminium is the third most abundant element in the Earth's crust ( Exley, 2009 ). It is often used as coagulants in water treatment process, usually in the form of alum, poly aluminium chloride, ferric aluminium sulphate and aluminium hydroxide chloride ( Evuti and Lawal, 2011 ).
  • Is alum a good coagulant for water treatment sludge?
  • For example, Nair and Ahammed (2017) reported 74.5% aluminium recovery from water treatment sludge using alum as coagulants, which is higher compared to this study. The difference could be due to the water treatment sludge used in their report was prepared in the laboratory while this study used sludge from a full-scale water treatment plant.
  • How much alum sludge is produced from drinking water treatment plants?
  • Virtually, alum sludge that is produced from drinking water treatment plants signifies up to 3% the volume of the raw water that is subjected for treatment (Hidalgo et al. 2017 ). However, it is difficulty to attain an exact estimation to the alum sludge produced in a region or a specific country.